<template>
    <div>
        <!-- 面包屑导航区 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>权限管理</el-breadcrumb-item>
            <el-breadcrumb-item>角色列表</el-breadcrumb-item>
        </el-breadcrumb>
        <!-- 卡片视图 -->
        <el-card>
            <!-- 添加角色按钮区域 -->
            <el-row>
                <el-col>
                    <el-button type="primary">添加角色</el-button>
                </el-col>
            </el-row>
            <!-- 角色列表区域 -->
            <el-table :data="roleList" border stripe>
                <!-- 展开列 -->
                <el-table-column type="expand">
                    <template slot-scope="scope">
                        <el-row
                            :class="['bdbottom', i1 === 0 ? 'bdtop' : '', , 'vcenter']"
                            v-for="(item1, i1) in scope.row.children"
                            :key="item1.id">
                            <!-- 渲染一级权限 -->
                            <el-col :span="5">
                                <el-tag closable @close="removeRightById(scope.row, item1.id)">
                                    {{ item1.authName }}
                                </el-tag>
                                <i class="el-icon-caret-right"></i>
                            </el-col>
                            <!-- 渲染二级和三级权限 -->
                            <el-col :span="19">
                                <!-- 通过for 循环嵌套渲染二级权限 -->
                                <el-row
                                    :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']"
                                    v-for="(item2, i2) in item1.children"
                                    :key="item2.id">
                                    <el-col :span="6">
                                        <el-tag type="success" closable @close="removeRightById(scope.row, item2.id)">
                                            {{ item2.authName }}
                                        </el-tag>
                                        <i class="el-icon-caret-right"></i>
                                    </el-col>
                                    <el-col :span="18">
                                        <el-tag
                                            type="warning"
                                            v-for="item3 in item2.children"
                                            :key="item3.id"
                                            closable
                                            @close="removeRightById(scope.row, item3.id)">
                                            {{ item3.authName }}
                                        </el-tag>
                                    </el-col>
                                </el-row>
                            </el-col>
                        </el-row>
                        <!-- <pre>
                            {{ scope.row }}
                        </pre> -->
                    </template>
                </el-table-column>
                <!-- 索引列 -->
                <el-table-column type="index"> </el-table-column>
                <el-table-column label="角色名称" prop="roleName"></el-table-column>
                <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
                <el-table-column label="操作" width="300px">
                    <template slot-scope="scope">
                        <el-button size="mini" type="primary" icon="el-icon-search">编辑</el-button>
                        <el-button size="mini" type="danger" icon="el-icon-delete">删除</el-button>
                        <el-button
                            size="mini"
                            type="warning"
                            icon="el-icon-setting"
                            @click="showSetRightDialog(scope.row)"
                            >分配权限</el-button
                        >
                    </template>
                </el-table-column>
            </el-table>
        </el-card>
        <!-- 分配权限对话框 -->
        <el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%" @close="setRightDialogClosed">
            <!-- 树形控件 -->

            <el-tree
                :data="rightslist"
                :props="treeProps"
                show-checkbox
                node-key="id"
                default-expand-all
                :default-expanded-keys="defKeys"></el-tree>
            <span slot="footer" class="dialog-footer">
                <el-button @click="setRightDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="setRightDialogVisible = false">确 定</el-button>
            </span>
        </el-dialog>
    </div>
</template>

<script>
    export default {
        data() {
            return {
                //所有角色列表数据
                roleList: [],
                //控制分配权限对话框的显示与隐藏
                setRightDialogVisible: false,
                //所有权限的数据
                rightslist: [],
                //树形控件 的属性绑定对象
                treeProps: {
                    label: 'authName',
                    children: 'children',
                },
                //默认选中的节点ID值数组
                defKeys: [],
            };
        },
        created() {
            this.getRolesList();
        },
        methods: {
            //获取所有角色列表
            async getRolesList() {
                const { data: res } = await this.$http.get('roles');
                if (res.meta.status !== 200) {
                    return this.$message.error('获取角色列表失败！');
                }

                this.roleList = res.data;
            },
            //根据ID 删除对应的权限
            async removeRightById(role, rightId) {
                //弹框提示用户是否删除
                const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
                    confirmButtonText: '确定',
                    cancelButtonText: '取消',
                    type: 'warning',
                }).catch(err => err);
                if (confirmResult !== 'confirm') {
                    return this.$message.info('取消了删除');
                }

                const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`);
                if (res.meta.status !== 200) {
                    return this.$message.error('删除权限失败');
                }
                // this.getRolesList();
                role.children = res.data;
            },
            //展示分配权限的对话框
            async showSetRightDialog(role) {
                //获取所有的权限数据
                const { data: res } = await this.$http.get('rights/tree');
                if (res.meta.status !== 200) {
                    return this.$message.error('获取权限数据失败');
                }
                //吧获取到的权限数据保存到data中
                this.rightslist = res.data;
                console.log(this.rightslist);
                //递归获取三级节点的id
                this.getLeafKeys(role, this.defKeys);

                this.setRightDialogVisible = true;
            },
            //通过递归的形式获取 角色下所有的三级权限的id，并保存到defKeys 数组中
            getLeafKeys(node, arr) {
                //如果当前node节点不包含children属性 则是三级节点
                if (!node.children) {
                    return arr.push(node.id);
                }
                node.children.forEach(item => this.getLeafKeys(item, arr));
            },
            //监听分配权限对话框的关闭事件
            setRightDialogClosed() {
                this.defKeys = [];
            },
        },
    };
</script>

<style lang="less" scoped>
    .el-tag {
        margin: 7px;
    }
    .bdtop {
        border-top: 1px solid #eee;
    }
    .bdbottom {
        border-bottom: 1px solid #eee;
    }
    .vcenter {
        display: flex;
        align-items: center;
    }
</style>
